Open-source alternative
for Mailgun
Mailgun is excellent for transactional emails. Plunk adds marketing campaigns, workflow automation, and is open-source.
The Pricing Model That Makes Sense
Pay for what you use, not fixed subscriptions
Pay per email sent
Pay-as-you-go pricing. Only pay for emails you actually send.
Tiered monthly plans
Monthly subscription with tiered email volume limits.
Feature-by-Feature
What Plunk Adds
Beyond transactional emails
Marketing Campaigns
Send one-time broadcasts to all contacts or specific segments. Schedule sends, track performance. Mailgun doesn't offer this.
Workflow Automation
Build multi-step email sequences with triggers, delays, and conditions. Perfect for onboarding, drip campaigns, cart abandonment.
Dynamic Segmentation
Create audience segments that update automatically based on contact data and behavior. Target campaigns precisely.
Open Source
AGPL-3.0 licensed. Inspect the code, contribute features, no vendor lock-in. Mailgun is proprietary.
Self-Hostable
Run on your infrastructure with Docker. Full data control, compliance-ready. Pay only AWS SES fees when self-hosting.
All-in-One Platform
One platform for transactional, marketing, and automation. No need for multiple tools or integrations.
Try Plunk free
1,000 emails/month free. No credit card required. Add marketing and automation when you need it.